A demo mod just came out for Doom 3 called 5.56mm Full Metal Jacket. I expected it to be some run-of-the-mill level mod.
I was floored.
5.56mm is a tactics shooter Doom 3 mod. Kind of like Counterstrike or Ghost Recon. I haven't had the chance to play it online yet, but it lacks an incredible visual punch. HDR lighting isn't working to its fullest yet because the team had some problems porting it to version 1.3.

Desert_delta_night. The ambient sound effects are perfect; it feels like it's nighttime.

The same map, but at daytime. Bright sun = shorter viewing distance

SOVIETS. Note that there's no lighting in this scene, but everything is still barely lit by ambient lighting (something that Doom 3 didn't/couldn't do).

This stage made my piss myself, if only because you can hear the plane fly over your head at the start of the stage.
I'm going to try the core game out how; hopefully the gameplay will keep up with the visuals.